ReefLink Information for Retailers - EcoTech Marine
ecotechmarine.com
The ReefLink is an RF-to-WiFi bridge. The product contains the hardware to communicate with existing wirelessly enabled EcoTech products (Radions and VorTechs) as well as future EcoTech products, and also with your WiFi router via WiFi or Ethernet cable.

G2 has upgraded LED panels. You also get a little more par out of them compared to the G1. But the G1 outfitted with TIR lenses comes close to the G2's performance (in terms of par). Here's some more info: